On the member list:
1) Remove the rank names column. It's just redundant and inefficient at this point. The icon column is good enough, and it'll free up some space. The icons are supposed to exist so that text wouldn't be necessary.
2) Sort by name or by rank.
3) Save the filter setting so that it doesn't forget when logging off.
4) Adjust the tooltip placement, so that it's not obstructing names above or below the currently highlighted name. Good tooltip design should mean the popups be outside of the user's navigation path.